Haj is the English transliteration of the Arabic word "حج". It refers to the Islamic pilgrimage to Mecca, Saudi Arabia, which is one of the Five Pillars of Islam. The pilgrimage involves visiting the Kaaba, performing specific rites, and is typically undertaken by Muslims at least once in their lifetime, if financially and physically able to do so.
Note: The provided meaning of the answer is for the latest New York Times crossword puzzle clue: One of Islam's Five Pillars. Explanations are generated by AI and may be inaccurate.